private void UpdateImageLists() { ImageList imgList = new ImageList(); imgList.ImageSize = new Size(16, 16); imgList.ColorDepth = ColorDepth.Depth32Bit; List <Image> lStdImages = new List <Image>(); foreach (Image imgStd in ext.pluginHost.MainWindow.ClientIcons.Images) { lStdImages.Add(imgStd); } imgList.Images.AddRange(lStdImages.ToArray()); Debug.Assert(imgList.Images.Count >= (int)PwIcon.Count); List <Image> lCustom = UIUtil.BuildImageListEx( mActiveDb.CustomIcons, 16, 16); if ((lCustom != null) && (lCustom.Count > 0)) { imgList.Images.AddRange(lCustom.ToArray()); } if (UIUtil.VistaStyleListsSupported) { mCustomTreeViewEx.ImageList = imgList; } else { List <Image> vAllImages = new List <Image>(); foreach (Image imgClient in imgList.Images) { vAllImages.Add(imgClient); } vAllImages.AddRange(lCustom); Debug.Assert(imgList.Images.Count == vAllImages.Count); ImageList imgSafe = UIUtil.ConvertImageList24(vAllImages, 16, 16, AppDefs.ColorControlNormal); mCustomTreeViewEx.ImageList = imgSafe; } }